Search for dissertations about: "welding dissertation"

Found 5 swedish dissertations containing the words welding dissertation.

  1. 1. Exposure, telomere length, and cancer risk

    Author : Huiqi Li; Avdelningen för arbets- och miljömedicin; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; exposure; telomere; methylation; chromosomal aberration; cancer risk; rubber fumes; arsenic; welding fumes; diesel exhaust; particulate matter;

    Abstract : Telomeres are tandem repeats of TTAGGG at the end of eukaryotic chromosomes. Telomeres play a key role in chromosome stability and regulation of the cellular lifespan. Telomeres are shortened during cell division, and probably, by not yet well characterised factors in the environment. READ MORE

  2. 2. Deformations and stresses in welded pipes : numerical and experimental investigation

    Author : Lars Troive; Luleå tekniska universitet; []
    Keywords : ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Computer Aided Design; Datorstödd maskinkonstruktion;

    Abstract : In this dissertation, deformations and stresses in welded pipes have been studied both numerically and experimentally. The aim of this work has been to investigate and verify finite element models for simulation of the fabrications of two types of pipe joints. READ MORE

  3. 3. Local Features for Range and Vision-Based Robotic Automation

    Author : Fredrik Viksten; Robert Forchheimer; Achim Lilienthal; Linköpings universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Local features; object pose estimation; range data; Image analysis; Bildanalys;

    Abstract : Robotic automation has been a part of state-of-the-art manufacturing for many decades. Robotic manipulators are used for such tasks as welding, painting, pick and place tasks etc. READ MORE

  4. 4. Affordable automation for airframe assembly : developing of key enabling technologies

    Author : Henrik Kihlman; Mats Björkman; Giorgos Nikoleris; Linköpings universitet; []
    Keywords : ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Abstract : Building aircraft is a challenging field. An aircraft has a life expectancy of 40 years, compared to just 10 years for a car. Given the vibrations of flying at close to Mach one at an altitude of 10,000 meters, these machines must function flawlessly in a tough environment. This demands high quality in the assembly processes. READ MORE

  5. 5. Cooperative and Interaction Control for Underwater Robotic Vehicles

    Author : Shahab Heshmati-Alamdari; Kostas J. Kyriakopoulos; National Technical University of Athens School of Mechanical Engineering Control Systems Lab; []
    Keywords : ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Marine robotics; Robotics; Underwater Vehicle Manipulator Systems; Cooperative manipulations; Visual servoing; Nonlinear Model Predictive Control; Autonomous Underwater Vehicles; Industriella informations- och styrsystem; Industrial Information and Control Systems; Farkostteknik; Vehicle and Maritime Engineering;

    Abstract : In this dissertation we address the problem of robust control for underwater robotic vehicles under resource constraints and inspired by practical applications in the field of marine robotics. By the term “resource constraints” we refer to systems with constraints on communication, sensing and energy resources. READ MORE